Recently I have looking around at books and I can't seem to find many of the older books. Not surprisingly the ones that still remain have been jazzed up. They still retain their quality. Much of the rest horrifies me and reminds me of the revolution in primary school books. There are all very shiny, with very limited aims and almost used as an excuse for companies to release a new book.
Now that is fine for a summer course . No-one has any expectations of them. But faced with the same light revision courses for a whole academic course is neither pleasant nor desirable. Many trees are sacrificed in the process. Coursebooks by their nature tend to be the crutch that comforts students. They are also a very good way to design and build a syllabus that will best serve students.
Beyond some of the revamped oldies like Headway and the very good New English File there doesn't seem to be an awful lot to work with. More is the pity.